LG Electronics 42LC2D(B), 32LC2D(B), 37LC2D(B) service manual TROUBLESHOOTING RF/Component/PC

Page 29
TROUBLESHOOTING RF/Component/PC

TROUBLESHOOTING RF/Component/PC

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Push the POWER

 

Turn OFF the Mute

 

 

 

 

ON key

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is the

 

 

Is the

 

 

No Audio

 

 

 

 

 

 

Set ON?

 

Mute ON?

 

 

 

 

 

 

 

 

Check the

 

 

RF SIF, Component

Check the interfacing ciruit of

 

L/R and PC L/R signal across

Analog Tuner, component

 

 

R212, R171-170, R505-506,

and PC audio accordingly

 

 

respectively according to The

w.r.t the mode.

 

 

corresponding mode

 

 

 

 

 

On jack board

Increase the Volume

Is Volume level

Of the set 0?

Correct them

Check the

Condition of all

Connectors, wafers,

I2C In corresponding

Signal flow?

Replace NSP

-

Replace the MSP

Check the

 

Check audio

supply voltage 8V

 

output at MSP across

 

across L403

 

R429-431.

Power Error

Check the

PWM output of NSP

across R436-439

Check the

Amplifier output level

At L423-426

There may be some error in Audio source.

Check

3.3V supply across

L402 and 1.8V at

C448

Power Error

Check 18V

supply at L421

Replace TAS5122(amp)

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Contents CHASSIS LD61A FACTORY NAME 32LC2DB-EC/37LC2DB-EC/42LC2DB-EC READ THE SAFETY PRECAUTIONS IN THIS MANUALBEFORE SERVICING THE CHASSIS SERVICE MANUALCONTENTS CONTENTSPRODUCT SAFETY SPECIFICATIONIMPORTANT SAFETY NOTICE SAFETY PRECAUTIONSGeneral Guidance Leakage Current Hot Check circuitElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSReplacement IC Remove/ReplacementSmall-Signal Discrete Transistor Removal/Replacement Power Output, Transistor Device Removal/Replacement1.General SpecificationTV SPECIFICATIONreatment of the front polarizer 2. General Specification4.Component Video Input Y, PB, PR 3.Optical FeatureLCD ModuleRGB-PC EDID DATA 5. RGB PC INPUT Mode Table6. RGB DTV INPUT Mode Table HDMI EDID DATA 7. HDMI INPUT Mode Table8. HDMI DTV Mode Table 8. Mechanical specification 7. Mechanical specification32LC2D Table 1 Scart Arrangement 1.Full ScartTable 2 Scart Arrangement 2.Half Scart 2. Specification ADJUSTMENT INSTRUCTION1. Application Range 3. Channel Memory6. ADC Calibration 5. Select method of Panel sizeBefore AV ADC Calibration, should be executed the Panel size selectionBefore White-balance, the AV ADC should be done 7. White BalanceCase1 EC and FC model use PAL-BGDHI composite signal Cool11000K - x 0.274±0.003, y 0.286±0.003FUNTION SVC REMOCONTROUBLESHOOTING No image attached? Is the input cableNo image PASS No image No image No image No image No image Volume level Of TROUBLESHOOTING AV1, 2, 3, 4/S-VideoAV4/S-Video L/R signal AV1,AV2 ,AV3TROUBLESHOOTING DTV/HDMI-Audio TROUBLESHOOTING RF/Component/PC TDFB-G236P DVB/PAL BLOCK DIAGRAMMainWafer FFC WaferAUDIO/VI DEO SW BLOCK DIAGRAMJackCXA2069Q Sound processor010 020050 EXPLODED VIEW32LC2DDESCRIPTION EXPLODED VIEW PARTS LIST32LC2DEXPLODED VIEW37LC2D EXPLODED VIEW PARTS LIST37LC2D 020080 130030 150 090 EXPLODED VIEW42LC2DEXPLODED VIEW PARTS LIST42LC2D CAPACITOR REPLACEMENT PARTS LISTMAIN BOARD DATE 2006. 05 DATE 2006. 05 DATE 2006. 05 DIODEs COIL & CORE & INDUCTOR RESISTORs TRANSISTORDATE 2006. 05 DATE 2006. 05 DATE 2006. 05 DATE 2006. 05 JACK BOARD OTHERsDATE 2006. 05 COIL & CORE & INDUCTOR DIODEsRESISTORs TRANSISTORDATE 2006. 05 CONTROL BOARD IR/LED BOARD SIDE A/V BOARDPage Page Page Page Page Printed in Korea P/NO 38289S0043
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